US9924508B2 - Communication duration configuring method, relay station, mobile station and mobile communication system - Google Patents

Communication duration configuring method, relay station, mobile station and mobile communication system Download PDF

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US9924508B2
US9924508B2 US13/596,908 US201213596908A US9924508B2 US 9924508 B2 US9924508 B2 US 9924508B2 US 201213596908 A US201213596908 A US 201213596908A US 9924508 B2 US9924508 B2 US 9924508B2
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station
relay station
communication
subframe
harq
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US20120320823A1 (en
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Yoshiaki Ohta
Yoshihiro Kawasaki
Yoshinori Tanaka
Tetsuya Yano
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Fujitsu Ltd
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    • H04W72/0426—
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/14—Relay systems
    • H04B7/15—Active relay systems
    • H04B7/155—Ground-based stations
    • H04B7/15528—Control of operation parameters of a relay station to exploit the physical medium
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/14—Relay systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1822—Automatic repetition systems, e.g. Van Duuren systems involving configuration of automatic repeat request [ARQ] with parallel processes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1829—Arrangements specially adapted for the receiver end
    • H04L1/1848—Time-out mechanisms
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1829—Arrangements specially adapted for the receiver end
    • H04L1/1854—Scheduling and prioritising arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/27—Control channels or signalling for resource management between access points
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1812—Hybrid protocols; Hybrid automatic repeat request [HARQ]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L2001/0092—Error control systems characterised by the topology of the transmission link
    • H04L2001/0097—Relays
    • H04W72/0413—
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/21—Control channels or signalling for resource management in the uplink direction of a wireless link, i.e. towards the network
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W84/00—Network topologies
    • H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
    • H04W84/04—Large scale networks; Deep hierarchical networks
    • H04W84/042—Public Land Mobile systems, e.g. cellular systems
    • H04W84/047—Public Land Mobile systems, e.g. cellular systems using dedicated repeater stations
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/08—Access point devices
    • H04W88/085—Access point devices with remote components

Definitions

  • the embodiments discussed herein are related to a relay technology of radio communication between a base station and a mobile station.
  • an evolution from a UMTS (universal mobile telecommunication system) to an LTE (long term evolution) has been devised.
  • LTE long term evolution
  • an OFDM (orthogonal frequency division multiplexing) and an SC-FDMA (single carrier-frequency division multiple access) are adopted respectively as downlink and uplink radio access technology, thereby enabling a high-speed radio packet communication to be performed at 100 Mb/s or higher for a downlink peak transmission rate and 50 Mb/s or higher for an uplink peak transmission rate.
  • LTE-A Long Term Evolution-Advanced
  • the downlink peak transmission rate of 1 Gb/s and the uplink peak transmission rate of 500 Mb/s are aimed at, and various new techniques are studied on a radio access system, a network architecture, etc. (3GPP TR 36. 913 V8. 0.
  • the method of deploying a relay station has been studied to support the communication between a base station and a mobile station (3GPP TR 36. 912 V9. 0. 0 (2009-09), 3rd Generation Partnership Project; Technical Specification group Radio Access Network; Feasibility study for Further Advancements for E-UTRA (LTE-Advanced) (Release 9)).
  • the relay station relays the communication between a base station (Doner eNB or eNB) and a mobile station (user equipment (UE)), and is provided to support a high-speed data communication. As illustrated in FIG.
  • the link between the mobile station UE and the relay station RN is referred to as a Uu
  • the link between the base station (eNB) and the relay station (RN) is referred to as a Un.
  • the Uu may be referred to as an access link
  • the Un may be referred to as a backhaul link.
  • Various schemes can be implemented to embody a relay station, but for example, a repeater scheme, a decode and forward scheme, an L2 scheme, and an L3 scheme have been studied.
  • the relay station in the repeater scheme has only the function of amplifying a radio signal (data signal and noise).
  • the relay station in the decode and forward scheme has the function of amplifying only a data signal in the radio signal.
  • the relay station in the L2 scheme has the function of the L2 such as a MAC layer etc.
  • the relay station in the L3 scheme has the function of the L3 such as an RRC layer etc., and functions like a base station.
  • the relay station in the L3 scheme is referred to as a Type1 RN in the LTE-A.
  • a method of evolving a relay station in to a cell is also studied.
  • a method of evolving a relay station to be provided at a cell edge to increase the throughput of the cell edge a method of evolving a relay station to be provided in a range where radio waves do not reach from the base station locally in a cell (dead spot), etc. are studied.
  • the relay station When data is transmitted between the base station and the mobile station through the relay station (Type1 RN) of the L3 scheme, it is preferable that no self-interference is generated in the relay station in inband relaying in which the same frequency band is shared between the base station and the relay station, and between the relay station and the mobile station.
  • the self-interference (or also called “loop interference”) refers to interference occurring when the relay station receives DL data from the base station to the relay station and simultaneously transmits downlink data to the mobile station, and the transmission data appears in a receiver of the relay station, thereby generating interference with the data from the base station. Likewise with the uplink data, there can occur the self-interference. When the self-interference occurs, the relay station cannot correctly receive data.
  • LTE-A 3GPP TR 36. 912 V9. 0. 0 (2009-09), 3rd Generation Partnership Project; Technical Specification group Radio Access Network; Feasibility study for Further Advancements for E-UTRA (LTE-Advanced) (Release 9).
  • (A) Downlink The relay station does not transmit data to the mobile station in the DL backhaul as a subframe for receiving data from an upper base station.
  • (B) Uplink The relay station does not receive data from the mobile station in the UL backhaul as a subframe for transmitting data to an upper base station.
  • the relay station can transmit a PDCCH (physical downlink control channel), a PHICH (physical hybrid ARQ indicator channel), a PCFICH (physical control format indicator channel) while it cannot transmit a PDSCH.
  • a reference signal is arranged in the first half (CTRL section illustrated in FIG. 3 ) of the MBSFN subframe, but it is not arranged in the last half of the MBSFN subframe.
  • control is performed in the relay station not to grant the mobile station permission to transmit uplink data before 4 subframes (4 ms) in the UL backhaul because if the mobile station is granted the permission to transmit uplink data before 4 ms in the uplink backhaul, the mobile station transmits data to the relay station in the uplink backhaul, which is to be avoided.
  • control is performed not to transmit downlink data to the mobile station before 4 subframes (4 ms) in the uplink backhaul for the following reason. That is, in the HARQ (hybrid automatic repeat request) of the LTE, it is regulated that a receiving station is to return an ACK/NACK signal in 4 ms (4 subframes) after a transmitting station transmits data. Therefore, if downlink data is transmitted to the mobile station in 4 ms in the uplink backhaul, the mobile station transmits the ACK/NACK signal to the relay station in the uplink backhaul, which is to be avoided.
  • HARQ hybrid automatic repeat request
  • a PUCCH physical uplink control channel
  • a PUSCH physical uplink shared channel
  • a radio frame having a duration of 10 ms is composed of ten subframes # 0 to # 9 each having a duration of 1 ms as a TTI (Transmission Time Interval).
  • FIG. 5 illustrates setting of 1 ms unit or timing of operations of (a) a downlink backhaul DL_BH, (b) a downstream access link DL_AL, (c) an uplink backhaul UL_BH, (d) an upstream access link UL_AL, and (e) HARQ processes (process numbers PID 1 , . . . , PID 8 ) of access link.
  • a downward arrow indicates transmission of a downlink signal
  • an upward arrow indicates transmission of an uplink signal.
  • black-filled portions mean that backhauls or access links are incapable of being configured.
  • the downlink backhauls are incapable of being configured in these subframes. Therefore, in this example, downlink backhauls are configured in the subframes # 1 in all of the continuing Frames.
  • the relay station RN sends back the ACK/NACK signal to the subframe # 5 with respect to the data transmission through the base station eNB in the subframe # 1 .
  • the uplink backhauls are configured in the subframes # 5 .
  • durations of the downlink or uplink backhauls are highlighted by solid thick frame lines.
  • a first problem is that backward compatibility with the LTE is lost.
  • an ACK/NACK signal is sent back after 4 ms of the data transmission.
  • the backhaul is configured as illustrated in FIG. 5
  • the ACK/NACK signal is to be sent back after 6 ms, and therefore the specifications of the LTE are not satisfied.
  • the ACK/NACK signal from the base station eNB toward the data transmission through the uplink backhaul (subframe # 5 ) corresponds to the downlink backhaul (subframe # 1 ) of the next Frame.
  • the backward compatibility with the LTE need not be maintained with regard to the reply timing of the HARQ, the above matter does not become a big problem.
  • a second problem is as follows. That is, in the configuration of the backhaul illustrated in FIG. 5 , a HARQ process in which the HARQ of an access link is incapable of being performed and duration of the HARQ process are scattered. Therefore, effective scheduling of the access link becomes difficult in the relay station RN.
  • a part (four portions; illustrated by thick lines) of the HARQ processes of the process numbers PID 2 , PID 4 , PID 6 , and PID 8 are incapable of being used.
  • the HARQ processes of the process numbers PID 2 , PID 4 , PID 6 , and PID 8 timing points of the uplink data transmission are matched with the uplink backhauls of the Frame_ 2 , Frame_ 3 , Frame_ 0 , and Frame_ 1 , respectively, and therefore the access links are incapable of being used. Accordingly, in the case of performing new data transmission, particular duration scattered as illustrated in FIG. 5 of the HARQ process in which the HARQ is incapable of being performed are avoided and scheduling is to be configured. As a result, there are problems that complexity of the scheduling is increased and the efficiency of the access link is reduced.
  • a communication duration configuring method for use in a mobile communication system including a relay station which relays radio communication between a base station and a mobile station.
  • the communication duration configuring method includes: configuring at least one of a downlink communication duration in which the relay station receives a transmission signal from the base station in a duration in which a transmission subframe from the relay station to the mobile station is configured as an MBSFN subframe and an uplink communication duration in which the relay station transmits a transmission signal to the base station while limiting transmission of a signal from the mobile station to the relay station; providing a plurality of communication processes in which communication processing including data transmission and an acknowledgment after a predetermined time period from the data transmission is managed on an access link between the mobile station and the relay station; making it possible to configure the uplink communication duration at timing according to the timing of uplink data transmission of a particular communication process among the plurality of communication processes; and configuring a downlink communication duration after a predetermined time period of each of configured uplink communication durations.
  • FIG. 1 is a configuration diagram illustrating a mobile communication system including a relay station RN which supports communication between a base station eNB and a mobile station UE;
  • FIG. 2 illustrates a link configuration among a base station eNB, a relay station RN, and a mobile station UE;
  • FIG. 3 illustrates a configuration guideline of a known backhaul
  • FIG. 4 illustrates a configuration of one Frame
  • FIG. 5 illustrates a problem in the case of configuring a backhaul in a position of the same subframe in a radio Frame at all times
  • FIG. 6 illustrates a configuration condition of a backhaul configuring method according to a first embodiment
  • FIGS. 7A to 7H illustrate one example of a backhaul configuring method according to a first embodiment
  • FIGS. 8A to 8H illustrate one example of a backhaul configuring method according to a second embodiment
  • FIGS. 9A and 9B tabulate backhauls configured by a backhaul configuring method exemplified in FIGS. 8A to 8H ;
  • FIGS. 10A to 10H illustrate one example of a backhaul configuring method according to a third embodiment
  • FIGS. 11A and 11B tabulate backhauls configured by a backhaul configuring method exemplified in FIGS. 10A to 10H ;
  • FIG. 12 illustrates one example of durations of a Measurement gap configured in a fourth embodiment
  • FIG. 13 is a block diagram illustrating a schematic configuration of a relay station RN according to a fifth embodiment
  • FIG. 14 is a block diagram illustrating a schematic configuration of a mobile station UE according to a fifth embodiment
  • FIG. 15 is a flowchart illustrating one example of operations of a relay station RN according to a fifth embodiment
  • FIG. 16 is a flowchart illustrating one example of operations of a relay station RN according to a fifth embodiment
  • FIG. 17 is a flowchart illustrating one example of operations of a mobile station UE according to a fifth embodiment.
  • FIG. 18 is a flowchart illustrating one example of operations of a mobile station UE according to a fifth embodiment.
  • a Donor eNB, a Relay Node, and User Equipment are appropriately abbreviated as a base station eNB, an RN, and a mobile station UE, respectively.
  • the base station eNB according to the present embodiment is a Donor eNB which supports a backhaul between its own station and the relay station RN.
  • a HARQ is appropriately referred to as one indicating processing (first communication processing) including data transmission and an acknowledgment after a predetermined time from the data transmission.
  • a backhaul duration represents one duration unit or a plurality of duration units among a plurality of duration units configured in a TTI (Transmission Time Interval) unit in a single radio Frame.
  • the TTI is configured as time of a subframe (1 ms) unit.
  • “Configuring a backhaul” means that a backhaul is configured or identified as a subframe in the radio frame. Note that also in the case where the TTI is not time of a subframe unit, the present embodiment is applicable.
  • the backhaul configuring method is a method of a case where backward compatibility with the LTE is maintained with regard to reply timing of the HARQ.
  • an ACK/NACK signal (A/N; acknowledgment) is here assumed to be sent back after 4 ms of the data transmission.
  • A/N acknowledgment
  • this backhaul configuring method it is intended that complexity of scheduling is reduced and efficiency of an access link is improved in such a manner that the number of HARQ processes (communication processes) incapable of being partly used is reduced as much as possible.
  • FIG. 6 A format of FIG. 6 is the same as that of the above-described FIG. 5 .
  • configurations of 1 ms unit or timing points of operations in each of (a) a downlink backhaul DL_BH, (b) a downstream access link DL_AL, (c) an uplink backhaul UL_BH, (d) an upstream access link UL_AL, and (e) a HARQ process (process numbers PID 1 , . . . , PID 8 ) as a communication process of an access link are illustrated in continuing Frames (Frame_ 0 , Frame_ 1 , Frame_ 2 , Frame_ 3 , . . . ).
  • a downward arrow indicates transmission of a downlink signal
  • an upward arrow indicates transmission of an uplink signal, respectively.
  • black-filled portions each mean that a backhaul link or access link is incapable of being configured.
  • subframes surrounded by solid thick frame lines each mean that a backhaul or access link is secured in the subframe.
  • the downlink backhaul is incapable of being configured in these subframes. Therefore, in the downlink backhaul DL_BH, the subframes # 0 , # 4 , # 5 , and # 9 are black-filled in respective Frames, and in the downstream access link DL_AL, the subframes # 0 , # 4 , # 5 , and # 9 are surrounded by solid thick frame lines in respective Frames.
  • the upstream access link for a reply of the ACK/NACK signal (A/N) is used. Therefore, in the upstream access link UL_AL, the subframes # 4 , # 8 , # 9 , and # 3 are surrounded by solid thick frame lines in respective Frames. In the uplink backhaul UL_BH, the subframes # 4 , # 8 , # 9 , and # 3 are black-filled in respective Frames.
  • FIGS. 7A to 7H illustrate a case where the HARQ processes of the process numbers PID 1 to PID 8 are configured as a HARQ process in which a HARQ is incapable of being at least partly used.
  • FIGS. 7A to 7H timing at which the HARQ is incapable of being performed is illustrated by thick lines.
  • FIG. 7A illustrates the backhaul configuring method in the case where only the HARQ process of the process number PID 1 is configured as a HARQ process in which a HARQ is incapable of being partly performed among the HARQ processes of the process numbers PID 1 to PID 8 . That is, the HARQ process in which the HARQ is incapable of being partly performed is limited to the HARQ process of the process number PID 1 .
  • the downlink backhauls of three times are secured among the continuing four Frames.
  • the downlink backhauls are configured in a subframe # 2 of the Frame_ 1 , the subframe # 8 of the Frame_ 2 , and a subframe # 6 of the Frame_ 3 .
  • the downlink backhauls are configured.
  • the ACK/NACK signal is sent back from the relay station RN. Therefore, the uplink backhauls are configured in the subframe # 6 of the Frame_ 1 , the subframe # 2 of the Frame_ 3 , and the subframe # 0 of the Frame_ 0 .
  • an upstream access link is incapable of being used.
  • all the HARQs (performance timing of thick lines) incapable of being performed belong to the same HARQ process (namely, the process number PID 1 ).
  • FIG. 7B illustrates the backhaul configuring method in the case where only the HARQ process of the process number PID 2 is configured as a HARQ process in which a HARQ is incapable of being partly performed among the HARQ processes of the process numbers PID 1 to PID 8 . That is, a HARQ process in which the HARQ is incapable of being partly performed is limited to the HARQ process of the process number PID 2 .
  • the downlink backhauls of three times are secured among the four continuing Frames.
  • the downlink backhauls are configured in the subframe # 3 of the Frame_ 1 , a subframe # 1 of the Frame_ 2 , and a subframe # 7 of the Frame_ 3 .
  • the downlink backhauls are configured.
  • the ACK/NACK signal (A/N) is sent back from the relay station RN. Therefore, the uplink backhauls are configured in the subframe # 1 of the Frame_ 0 , the subframe # 7 of the Frame_ 1 , and the subframe # 5 of the Frame_ 2 .
  • FIG. 7C illustrates the backhaul configuring method in the case where only the HARQ process of the process number PID 3 is configured as a HARQ process in which a HARQ is incapable of being partly performed among the HARQ processes of the process numbers PID 1 to PID 8 . That is, a HARQ process in which the HARQ is incapable of being partly performed is limited to the HARQ process of the process number PID 3 .
  • the downlink backhauls of three times are secured among the four continuing Frames.
  • the downlink backhauls are configured in the subframe # 6 of the Frame_ 0 , the subframe # 2 of the Frame_ 2 , and the subframe # 8 of the Frame_ 3 .
  • the downlink backhauls are configured.
  • the ACK/NACK signal is sent back from the relay station RN. Therefore, the uplink backhauls are configured in the subframe # 2 of the Frame_ 0 , the subframe # 0 of the Frame_ 1 , and the subframe # 6 of the Frame_ 2 .
  • FIG. 7D illustrates the backhaul configuring method in the case where only the HARQ process of the process number PID 4 is configured as a HARQ process in which a HARQ is incapable of being partly performed among the HARQ processes of the process numbers PID 1 to PID 8 . That is, a HARQ process in which the HARQ is incapable of being partly performed is limited to the HARQ process of the process number PID 4 .
  • the downlink backhauls of three times are secured among the four continuing Frames.
  • the downlink backhauls are configured in the subframe # 7 of the Frame_ 0 , the subframe # 3 of the Frame_ 2 , and the subframe # 1 of the Frame_ 3 .
  • the downlink backhauls are configured.
  • the ACK/NACK signal is sent back from the relay station RN. Therefore, the uplink backhauls are configured in the subframe # 1 of the Frame_ 1 , the subframe # 7 of the Frame_ 2 , and the subframe # 5 of the Frame_ 3 .
  • FIG. 7E illustrates the backhaul configuring method in the case where only the HARQ process of the process number PID 5 is configured as a HARQ process in which a HARQ is incapable of being partly performed among the HARQ processes of the process numbers PID 1 to PID 8 . That is, a HARQ process in which the HARQ is incapable of being partly performed is limited to the HARQ process of the process number PID 5 .
  • the downlink backhauls of three times are secured among the four continuing Frames.
  • the downlink backhauls are configured in the subframe # 8 of the Frame_ 0 , a subframe # 6 of the Frame_ 1 , and a subframe # 2 of the Frame_ 3 .
  • the downlink backhauls are configured.
  • the ACK/NACK signal is sent back from the relay station RN. Therefore, the uplink backhauls are configured in the subframe # 2 of the Frame_ 1 , the subframe # 0 of the Frame_ 2 , and the subframe # 6 of the Frame_ 3 .
  • FIG. 7F illustrates the backhaul configuring method in the case where only the HARQ process of the process number PID 6 is configured as a HARQ process in which a HARQ is incapable of being partly performed among the HARQ processes of the process numbers PID 1 to PID 8 . That is, a HARQ process in which the HARQ is incapable of being partly performed is limited to the HARQ process of the process number PID 6 .
  • the downlink backhauls of three times are secured among the four continuing Frames.
  • the downlink backhauls are configured in the subframe # 1 of the Frame_ 0 , the subframe # 7 of the Frame_ 1 , and the subframe # 3 of the Frame_ 3 .
  • the downlink backhauls are configured.
  • the ACK/NACK signal is sent back from the relay station RN. Therefore, the uplink backhauls are configured in the subframe # 5 of the Frame_ 0 , the subframe # 1 of the Frame_ 2 , and the subframe # 7 of the Frame_ 3 .
  • FIG. 7G illustrates the backhaul configuring method in the case where only the HARQ process of the process number PID 7 is configured as a HARQ process in which a HARQ is incapable of being partly performed among the HARQ processes of the process numbers PID 1 to PID 8 . That is, a HARQ process in which the HARQ is incapable of being partly performed is limited to the HARQ process of the process number PID 7 .
  • the downlink backhauls of three times are secured among the four continuing Frames.
  • the downlink backhauls are configured in the subframe # 2 of the Frame_ 0 , the subframe # 8 of the Frame_ 1 , and the subframe # 6 of the Frame_ 2 .
  • the downlink backhauls are configured.
  • the ACK/NACK signal is sent back from the relay station RN. Therefore, the uplink backhauls are configured in the subframe # 6 of the Frame_ 0 , the subframe # 2 of the Frame_ 2 , and the subframe # 0 of the Frame_ 3 .
  • FIG. 7H illustrates the backhaul configuring method in the case where only the HARQ process of the process number PID 8 is configured as a HARQ process in which a HARQ is incapable of being partly performed among the HARQ processes of the process numbers PID 1 to PID 8 . That is, a HARQ process in which the HARQ is incapable of being partly performed is limited to the HARQ process of the process number PID 8 .
  • the downlink backhauls of three times are secured among the four continuing Frames.
  • the downlink backhauls are configured in the subframe # 3 of the Frame_ 0 , the subframe # 1 of the Frame_ 1 , and a subframe # 7 of the Frame_ 2 .
  • the downlink backhauls are configured.
  • the ACK/NACK signal is sent back from the relay station RN. Therefore, the uplink backhauls are configured in the subframe # 7 of the Frame_ 0 , the subframe # 5 of the Frame_ 1 , and the subframe # 1 of the Frame_ 3 .
  • the backhaul is configured in such a manner that the HARQ process in which the HARQ on an upstream access link is incapable of being partly performed is limited to one HARQ process. Accordingly, although the configuration frequency (three times among four Frames) of the backhaul is relatively small, the HARQ process in which the HARQ on the upstream access link is incapable of being partly performed is integrated. Further, the complexity of the scheduling is reduced, and the efficiency of the access link is improved.
  • the backward configuring method according to the present embodiment is a method of a case where backward compatibility with the LTE is maintained with regard to reply timing of the HARQ.
  • an ACK/NACK signal is here assumed to be sent back after 4 ms of data transmission.
  • the present embodiment differs from the first embodiment in that the configuration frequency of the backhaul is increased. Through the process, as compared with the first embodiment, while the configuration frequency of the backhaul is more increased, the efficiency of the access link is maintained.
  • FIGS. 8A to 8H illustrate a case where each of the HARQ processes of the process numbers PID 1 to PID 8 is a HARQ process in which the HARQ is incapable of being performed at all timing points.
  • FIGS. 8A to 8H further illustrate by thick lines the timing at which the HARQ is incapable of being performed.
  • FIGS. 8A to 8H portions of subframes incapable of being used as the upstream access link are displayed to be black-filled by dotted thick frame lines.
  • a downlink backhaul is each added to the backhaul configuring method illustrated in FIGS. 7A to 7H , thereby securing the downlink backhaul of one time in each Frame. Further, in the backhaul configuring method illustrated in FIGS. 8A to 8H , the HARQ process in which the HARQ is incapable of being performed at all the timing points is each configured, thereby securing the number of the uplink backhauls more.
  • the downlink backhaul is newly added and configured in the subframe # 8 of the Frame_ 0 .
  • the downlink backhaul is configured in the same positions as in the above also in Frames continuous with the Frame_ 0 to Frame_ 3 .
  • the uplink backhaul is configured in the subframe # 2 of the Frame_ 1 for sending back the ACK/NACK signal from the relay station RN.
  • the number of the uplink backhauls is more secured. Specifically, correspondingly to the upstream access link in the HARQ process of the process number PID 1 , the uplink backhauls are configured in the subframe # 8 of the Frame_ 0 and the subframe # 4 of the Frame_ 2 . In the added and configured downlink backhaul (the subframe # 8 of the Frame_ 0 ), the uplink backhaul is further configured in the subframe # 4 of the Frame_ 0 before 4 ms so as to receive the ACK/NACK signal from the base station eNB.
  • the newly configured uplink backhaul having the configuration condition different from that using as a base the LTE illustrated in FIG. 6 is controlled by the relay station RN in such a manner that transmission is not performed through the upstream access link.
  • the HARQ process in which the HARQ is incapable of being performed is integrated into a part of the HARQ processes (the PID 1 and the PID 5 shifted by 4 ms from the PID 1 ).
  • the downlink backhauls of four times and the uplink backhauls of seven times are capable of being configured for every four Frames.
  • the downlink backhaul is newly added and configured in the subframe # 1 of the Frame_ 0 .
  • the downlink backhaul is configured in the same positions as in the above also in Frames continuous with the Frame_ 0 to Frame_ 3 .
  • the uplink backhaul is configured in the subframe # 5 of the Frame_ 0 for sending back the ACK/NACK signal from the relay station RN.
  • the number of the uplink backhauls is more secured. Specifically, correspondingly to the upstream access link in the HARQ process of the process number PID 2 , the uplink backhauls are configured in the subframe # 9 of the Frame_ 0 and the subframe # 3 of the Frame_ 3 . In the added and configured downlink backhaul (the subframe # 1 of the Frame_ 0 ), the uplink backhaul is further configured in the subframe # 7 of the Frame_ 3 before 4 ms so as to receive the ACK/NACK signal from the base station eNB.
  • the newly configured uplink backhaul having the configuration condition different from that using as a base the LTE illustrated in FIG. 6 is controlled by the relay station RN in such a manner that transmission is not performed through the upstream access link.
  • the HARQ process in which the HARQ is incapable of being performed is integrated into a part of the HARQ processes (the PID 2 , and the PID 6 shifted by 4 ms from the PID 2 ).
  • the downlink backhauls of four times and the uplink backhauls of seven times are capable of being configured for every four Frames.
  • the downlink backhaul is newly added and configured in the subframe # 8 of the Frame_ 1 .
  • the downlink backhaul is configured in the same positions as in the above also in Frames continuous with the Frame_ 0 to Frame_ 3 .
  • the uplink backhaul is configured in the subframe # 2 of the Frame_ 2 for sending back the ACK/NACK signal from the relay station RN.
  • the number of the uplink backhauls is more secured.
  • the uplink backhauls are configured in the subframe # 8 of the Frame_ 1 and the subframe # 4 of the Frame_ 3 .
  • the uplink backhaul is further configured in the subframe # 4 of the Frame_ 1 before 4 ms so as to receive the ACK/NACK signal from the base station eNB.
  • the newly configured uplink backhaul having the configuration condition different from that using as a base the LTE illustrated in FIG. 6 is controlled by the relay station RN in such a manner that transmission is not performed through the upstream access link.
  • the HARQ process in which the HARQ is incapable of being performed is integrated into a part of the HARQ processes (the PID 3 , and the PID 7 shifted by 4 ms from the PID 3 ).
  • the downlink backhauls of four times and the uplink backhauls of seven times are capable of being configured for every four Frames.
  • the downlink backhaul is newly added and configured in the subframe # 1 of the Frame_ 1 .
  • the downlink backhaul is configured in the same positions as in the above also in Frames continuous with the Frame_ 0 to Frame_ 3 .
  • the uplink backhaul is configured in the subframe # 5 of the Frame_ 1 for sending back the ACK/NACK signal from the relay station RN.
  • the number of the uplink backhauls is more secured. Specifically, correspondingly to the upstream access link in the HARQ process of the process number PID 4 , the uplink backhauls are configured in the subframe # 3 of the Frame_ 0 and the subframe # 9 of the Frame_ 1 . In the added and configured downlink backhaul (the subframe # 1 of the Frame_ 1 ), the uplink backhaul is further configured in the subframe # 7 of the Frame_ 0 before 4 ms so as to receive the ACK/NACK signal from the base station eNB.
  • the newly configured uplink backhaul having the configuration condition different from that using as a base the LTE illustrated in FIG. 6 is controlled by the relay station RN in such a manner that transmission is not performed through the upstream access link.
  • the HARQ process in which the HARQ is incapable of being performed is integrated into a part of the HARQ processes (the PID 4 , and the PID 8 shifted by 4 ms from the PID 4 ).
  • the downlink backhauls of four times and the uplink backhauls of seven times are capable of being configured for every four Frames.
  • the downlink backhaul is newly added and configured in the subframe # 8 of the Frame_ 2 .
  • the downlink backhaul is configured in the same positions as in the above also in Frames continuous with the Frame_ 0 to Frame_ 3 .
  • the uplink backhaul is configured in the subframe # 2 of the Frame_ 3 for sending back the ACK/NACK signal from the relay station RN.
  • the number of the uplink backhauls is more secured. Specifically, correspondingly to the upstream access link in the HARQ process of the process number PID 5 , the uplink backhauls are configured in the subframe # 4 of the Frame_ 0 and the subframe # 8 of the Frame_ 2 . In the added and configured downlink backhaul (the subframe # 8 of the Frame_ 2 ), the uplink backhaul is further configured in the subframe # 4 of the Frame_ 2 before 4 ms so as to receive the ACK/NACK signal from the base station eNB.
  • the newly configured uplink backhaul having the configuration condition different from that using as a base the LTE illustrated in FIG. 6 is controlled by the relay station RN in such a manner that transmission is not performed through the upstream access link.
  • the HARQ process in which the HARQ is incapable of being performed is integrated into a part of the HARQ processes (the PID 5 and the PID 1 shifted by 4 ms from the PID 5 ).
  • the downlink backhauls of four times and the uplink backhauls of seven times are capable of being configured for every four Frames.
  • the downlink backhaul is newly added and configured in the subframe # 1 of the Frame_ 2 .
  • the downlink backhaul is configured in the same positions as in the above also in Frames continuous with the Frame_ 0 to Frame_ 3 .
  • the uplink backhaul is configured in the subframe # 5 of the Frame_ 2 for sending back the ACK/NACK signal from the relay station RN.
  • the number of the uplink backhauls is more secured. Specifically, correspondingly to the upstream access link in the HARQ process of the process number PID 6 , the uplink backhauls are configured in the subframe # 3 of the Frame_ 1 and the subframe # 9 of the Frame_ 2 . In the added and configured downlink backhaul (the subframe # 1 of the Frame_ 2 ), the uplink backhaul is further configured in the subframe # 7 of the Frame_ 1 before 4 ms so as to receive the ACK/NACK signal from the base station eNB.
  • the newly configured uplink backhaul having the configuration condition different from that using as a base the LTE illustrated in FIG. 6 is controlled by the relay station RN in such a manner that transmission is not performed through the upstream access link.
  • the HARQ process in which the HARQ is incapable of being performed is integrated into a part of the HARQ processes (the PID 6 and the PID 2 shifted by 4 ms from the PID 6 ).
  • the downlink backhauls of four times and the uplink backhauls of seven times are capable of being configured for every four Frames.
  • the downlink backhaul is newly added and configured in the subframe # 8 of the Frame_ 3 .
  • the downlink backhaul is configured in the same positions as in the above also in Frames continuous with the Frame_ 0 to Frame_ 3 .
  • the uplink backhaul is configured in the subframe # 2 of the Frame_ 0 for sending back the ACK/NACK signal from the relay station RN.
  • the number of the uplink backhauls is more secured.
  • the uplink backhauls are configured in the subframe # 4 of the Frame_ 1 and the subframe # 8 of the Frame_ 3 .
  • the uplink backhaul is further configured in the subframe # 4 of the Frame_ 3 before 4 ms so as to receive the ACK/NACK signal from the base station eNB.
  • the newly configured uplink backhaul having the configuration condition different from that using as a base the LTE illustrated in FIG. 6 is controlled by the relay station RN in such a manner that transmission is not performed through the upstream access link.
  • the HARQ process in which the HARQ is incapable of being performed is integrated into a part of the HARQ processes (the PID 7 and the PID 3 shifted by 4 ms from the PID 7 ).
  • the downlink backhauls of four times and the uplink backhauls of seven times are capable of being configured for every four Frames.
  • the downlink backhaul is newly added and configured in the subframe # 1 of the Frame_ 3 .
  • the downlink backhaul is configured in the same positions as in the above also in Frames continuous with the Frame_ 0 to Frame_ 3 .
  • the uplink backhaul is configured in the subframe # 5 of the Frame_ 3 for sending back the ACK/NACK signal from the relay station RN.
  • the number of the uplink backhauls is more secured.
  • the uplink backhauls are configured in the subframe # 3 of the Frame_ 2 and the subframe # 9 of the Frame_ 3 .
  • the uplink backhaul is further configured in the subframe # 7 of the Frame_ 2 before 4 ms so as to receive the ACK/NACK signal from the base station eNB.
  • the newly configured uplink backhaul having the configuration condition different from that using as a base the LTE illustrated in FIG. 6 is controlled by the relay station RN in such a manner that transmission is not performed through the upstream access link.
  • the HARQ process in which the HARQ is incapable of being performed is integrated into a part of the HARQ processes (the PID 8 and the PID 4 shifted by 4 ms from the PID 8 ).
  • the downlink backhauls of four times and the uplink backhauls of seven times are capable of being configured for every four Frames.
  • FIGS. 9A and 9B tabulate the backhauls configured by the backhaul configuring method exemplified in FIGS. 8A to 8H .
  • An SFN System Frame Number
  • the uplink backhaul is configured.
  • the uplink backhaul not described in FIG. 9B is appropriately determined according to a value of each configuration, namely, the timing of the uplink transmission of the HARQ process to be integrated.
  • a plurality of HARQ processes are integrated into the HARQ process in which the HARQ is incapable of being performed for more securing the configuration frequency of the downlink and uplink backhauls.
  • the configuration frequency of the backhaul is more increased and the scheduling on the access link of the relay station RN is easily performed to maintain the efficiency of the access link.
  • both of the above matters are compatible with a high level.
  • the downlink backhaul is not configured after 4 ms of the uplink backhaul configured in the subframe # 2 of the Frame_ 1 . Therefore, it is not preferred that on the uplink backhaul configured in the subframe # 2 of the Frame_ 1 , the relay station RN transmits data (user data) necessary for a reply of the ACK/NACK signal to the base station eNB. The reason is that the downlink backhaul is not configured after 4 ms of the uplink backhaul configured in the subframe # 2 of the Frame_ 1 .
  • the relay station RN transmits data unnecessary for a reply of the ACK/NACK signal from the base station eNB.
  • Examples of the data unnecessary for a reply of the ACK/NACK signal include data for a CQI (Channel Quality Indicator) report.
  • the second embodiment there is illustrated an example in which a backhaul is added to the backhauls configured according to the first embodiment and the downlink backhaul is secured in each Frame.
  • the downlink backhaul is arbitrarily configured in each frame.
  • the ACK/NACK signal is sent back after 4 ms of the data transmission.
  • the backhaul is preferably configured in such a manner that the number of the HARQ processes in which the HARQ is incapable of being performed partly or wholly is reduced as much as possible.
  • FIGS. 10A to 10H Formats of FIGS. 10A to 10H are the same as that of FIG. 6 .
  • FIGS. 10A to 10H each illustrate a case where the HARQ process in which the HARQ is incapable of being partly performed stands in the HARQ processes of the process numbers PID 1 to PID 8 and the HARQ processes of the process numbers PID 5 to PID 8 shifted after 4 ms of the above HARQ processes.
  • FIGS. 10A to 10H further illustrate by using thick lines the timing points at which the HARQ is incapable of being performed.
  • the backhaul configuring method illustrated in FIGS. 10A to 10H differs from that illustrated in FIGS. 8A to 8H in that two HARQ processes in which the HARQ is incapable of being partly performed are configured.
  • the downlink backhauls are secured in each of the four continuing frames. Specifically, in FIG. 10A , in the subframe # 8 of the Frame_ 0 , the subframe # 6 of the Frame_ 1 , the subframe # 8 of the Frame_ 2 , and the subframe # 6 of the Frame_ 3 , the downlink backhauls are configured. Also, with relation to Frames continuous with the Frame_ 0 to Frame_ 3 , the downlink backhauls are configured in the same position as in the above.
  • the uplink backhauls are configured in the subframe # 2 of the Frame_ 1 , the subframe # 0 of the Frame_ 2 , the subframe # 2 of the Frame_ 3 , and the subframe # 0 of the Frame_ 0 .
  • the HARQ process of the process number PID 1 and the HARQ process of the process number PID 5 shifted after 4 ms from the HARQ process of the process number PID 1 .
  • the uplink backhauls are configured in the subframe # 4 of the Frame_ 2 corresponding to the upstream access link in the HARQ process of the process number PID 1 , and the subframe # 4 of the Frame_ 0 corresponding to the upstream access link in the HARQ process of the process number PID 5 .
  • a part of the configured uplink backhauls having the configuration condition different from that using as a base the LTE illustrated in FIG. 6 are controlled by the relay station RN in such a manner that transmission is not performed through the upstream access link.
  • the HARQ processes in which the HARQ is incapable of being partly performed are integrated into a part of the HARQ processes (PID 1 and the PID 5 shifted by 4 ms from the PID 1 ).
  • the downlink backhauls of four times and the uplink backhauls of six times are capable of being configured for every four Frames.
  • the downlink backhauls are secured in each of the four continuing frames. Specifically, in FIG. 10B , in the subframe # 1 of the Frame_ 0 , the subframe # 3 of the Frame_ 1 , the subframe # 1 of the Frame_ 2 , and the subframe # 3 of the Frame_ 3 , the downlink backhauls are configured. Also, with relation to Frames continuous with the Frame_ 0 to Frame_ 3 , the downlink backhauls are configured in the same position as in the above.
  • the uplink backhauls are configured in the subframe # 5 of the Frame_ 0 , the subframe # 7 of the Frame_ 1 , the subframe # 5 of the Frame_ 2 , and the subframe # 7 of the Frame_ 3 .
  • the uplink backhauls are configured in the subframe # 9 of the Frame_ 0 corresponding to the upstream access link in the HARQ process of the process number PID 2 , and the subframe # 9 of the Frame_ 2 corresponding to the upstream access link in the HARQ process of the process number PID 6 .
  • a part of the configured uplink backhauls having the configuration condition different from that using as a base the LTE illustrated in FIG. 6 are controlled by the relay station RN in such a manner that transmission is not performed through the upstream access link.
  • the HARQ processes in which the HARQ is incapable of being partly performed are integrated into a part of the HARQ processes (PID 2 and the PID 6 shifted by 4 ms from the PID 2 ).
  • the downlink backhauls of four times and the uplink backhauls of six times are capable of being configured for every four Frames.
  • the downlink backhauls are secured in each of the four continuing frames. Specifically, in FIG. 10C , in the subframe # 6 of the Frame_ 0 , the subframe # 8 of the Frame_ 1 , the subframe # 6 of the Frame_ 2 , and the subframe # 8 of the Frame_ 3 , the downlink backhauls are configured. Also, with relation to Frames continuous with the Frame_ 0 to Frame_ 3 , the downlink backhauls are configured in the same position as in the above.
  • the uplink backhauls are configured in the subframe # 0 of the Frame_ 1 , the subframe # 2 of the Frame_ 2 , the subframe # 0 of the Frame_ 3 , and the subframe # 2 of the Frame_ 0 .
  • the uplink backhauls are configured in the subframe # 4 of the Frame_ 3 corresponding to the upstream access link in the HARQ process of the process number PID 3 , and the subframe # 4 of the Frame_ 1 corresponding to the upstream access link in the HARQ process of the process number PID 7 .
  • a part of the configured uplink backhauls having the configuration condition different from that using as a base the LTE illustrated in FIG. 6 are controlled by the relay station RN in such a manner that transmission is not performed through the upstream access link.
  • the HARQ processes in which the HARQ is incapable of being partly performed are integrated into a part of the HARQ processes (PID 3 and the PID 7 shifted by 4 ms from the PID 3 ).
  • the downlink backhauls of four times and the uplink backhauls of six times are capable of being configured for every four Frames.
  • the downlink backhauls are secured in each of the four continuing frames. Specifically, in FIG. 10D , in the subframe # 3 of the Frame_ 0 , the subframe # 1 of the Frame_ 1 , the subframe # 3 of the Frame_ 2 , and the subframe # 1 of the Frame_ 3 , the downlink backhauls are configured. Also, with relation to Frames continuous with the Frame_ 0 to Frame_ 3 , the downlink backhauls are configured in the same position as in the above.
  • the uplink backhauls are configured in the subframe # 7 of the Frame_ 0 , the subframe # 5 of the Frame_ 1 , the subframe # 7 of the Frame_ 2 , and the subframe # 5 of the Frame_ 3 .
  • the HARQ process of the process number PID 4 and the HARQ process of the process number PID 8 shifted after 4 ms from the HARQ process of the process number PID 4 .
  • the uplink backhauls are configured in the subframe # 9 of the Frame_ 1 corresponding to the upstream access link in the HARQ process of the process number PID 4 , and the subframe # 9 of the Frame_ 3 corresponding to the upstream access link in the HARQ process of the process number PID 8 .
  • a part of the configured uplink backhauls having the configuration condition different from that using as a base the LTE illustrated in FIG. 6 are controlled by the relay station RN in such a manner that transmission is not performed through the upstream access link.
  • the HARQ processes in which the HARQ is incapable of being partly performed are integrated into a part of the HARQ processes (PID 4 and the PID 8 shifted by 4 ms from the PID 4 ).
  • the downlink backhauls of four times and the uplink backhauls of six times are capable of being configured for every four Frames.
  • the downlink backhauls are secured in each of the four continuing frames. Specifically, in the subframe # 8 of the Frame_ 0 , the subframe # 6 of the Frame_ 1 , the subframe # 8 of the Frame_ 2 , and the subframe # 6 of the Frame_ 3 , the downlink backhauls are configured. Also, with relation to Frames continuous with the Frame_ 0 to Frame_ 3 , the downlink backhauls are configured in the same position as in the above.
  • the uplink backhauls are configured in the subframe # 2 of the Frame_ 1 , the subframe # 0 of the Frame_ 2 , the subframe # 2 of the Frame_ 3 , and the subframe # 0 of the Frame_ 0 .
  • the HARQ process of the process number PID 5 and the HARQ process of the process number PID 1 shifted after 4 ms from the HARQ process of the process number PID 5 .
  • the uplink backhauls are configured in the subframe # 4 of the Frame_ 0 corresponding to the upstream access link in the HARQ process of the process number PID 5 , and the subframe # 4 of the Frame_ 2 corresponding to the upstream access link in the HARQ process of the process number PID 1 .
  • a part of the configured uplink backhauls having the configuration condition different from that using as a base the LTE illustrated in FIG. 6 are controlled by the relay station RN in such a manner that transmission is not performed through the upstream access link.
  • the HARQ processes in which the HARQ is incapable of being partly performed are integrated into a part of the HARQ processes (PID 5 and the PID 1 shifted by 4 ms from the PID 5 ).
  • the downlink backhauls of four times and the uplink backhauls of six times are capable of being configured for every four Frames.
  • the downlink backhauls are secured in each of the four continuing frames. Specifically, in FIG. 10F , in the subframe # 1 of the Frame_ 0 , the subframe # 3 of the Frame_ 1 , the subframe # 1 of the Frame_ 2 , and the subframe # 3 of the Frame_ 3 , the downlink backhauls are configured. Also, with relation to Frames continuous with the Frame_ 0 to Frame_ 3 , the downlink backhauls are configured in the same position as in the above.
  • the uplink backhauls are configured in the subframe # 5 of the Frame_ 0 , the subframe # 7 of the Frame_ 1 , the subframe # 5 of the Frame_ 2 , and the subframe # 7 of the Frame_ 3 .
  • the HARQ process of the process number PID 6 and the HARQ process of the process number PID 2 shifted after 4 ms from the HARQ process of the process number PID 6 .
  • the uplink backhauls are configured in the subframe # 9 of the Frame_ 2 corresponding to the upstream access link in the HARQ process of the process number PID 6 , and the subframe # 9 of the Frame_ 0 corresponding to the upstream access link in the HARQ process of the process number PID 2 .
  • a part of the configured uplink backhauls having the configuration condition different from that using as a base the LTE illustrated in FIG. 6 are controlled by the relay station RN in such a manner that transmission is not performed through the upstream access link.
  • the HARQ processes in which the HARQ is incapable of being partly performed are integrated into a part of the HARQ processes (PID 6 and the PID 2 shifted by 4 ms from the PID 6 ).
  • the downlink backhauls of four times and the uplink backhauls of six times are capable of being configured for every four Frames.
  • the downlink backhauls are secured in each of the four continuing frames. Specifically, in FIG. 10G , in the subframe # 6 of the Frame_ 0 , the subframe # 8 of the Frame_ 1 , the subframe # 6 of the Frame_ 2 , and the subframe # 8 of the Frame_ 3 , the downlink backhauls are configured. Also, with relation to Frames continuous with the Frame_ 0 to Frame_ 3 , the downlink backhauls are configured in the same position as in the above.
  • the uplink backhauls are configured in the subframe # 0 of the Frame_ 1 , the subframe # 2 of the Frame_ 2 , the subframe # 0 of the Frame_ 3 , and the subframe # 2 of the Frame_ 0 .
  • the uplink backhauls are configured in the subframe # 4 of the Frame_ 1 corresponding to the upstream access link in the HARQ process of the process number PID 7 , and the subframe # 4 of the Frame_ 3 corresponding to the upstream access link in the HARQ process of the process number PID 3 .
  • a part of the configured uplink backhauls having the configuration condition different from that using as a base the LTE illustrated in FIG. 6 are controlled by the relay station RN in such a manner that transmission is not performed through the upstream access link.
  • the HARQ processes in which the HARQ is incapable of being partly performed are integrated into a part of the HARQ processes (PID 7 and the PID 3 shifted by 4 ms from the PID 7 ).
  • the downlink backhauls of four times and the uplink backhauls of six times are capable of being configured for every four Frames.
  • the downlink backhauls are secured in each of the four continuing frames. Specifically, in FIG. 10H , in the subframe # 3 of the Frame_ 0 , the subframe # 1 of the Frame_ 1 , the subframe # 3 of the Frame_ 2 , and the subframe # 1 of the Frame_ 3 , the downlink backhauls are configured. Also, with relation to Frames continuous with the Frame_ 0 to Frame_ 3 , the downlink backhauls are configured in the same position as in the above.
  • the uplink backhauls are configured in the subframe # 7 of the Frame_ 0 , the subframe # 5 of the Frame_ 1 , the subframe # 7 of the Frame_ 2 , and the subframe # 5 of the Frame_ 3 .
  • the uplink backhauls are configured in the subframe # 9 of the Frame_ 3 corresponding to the upstream access link in the HARQ process of the process number PID 8 , and the subframe # 9 of the Frame_ 1 corresponding to the upstream access link in the HARQ process of the process number PID 4 .
  • a part of the configured uplink backhauls having the configuration condition different from that using as a base the LTE illustrated in FIG. 6 are controlled by the relay station RN in such a manner that transmission is not performed through the upstream access link.
  • the HARQ processes in which the HARQ is incapable of being partly performed are integrated into a part of the HARQ processes (PID 8 and the PID 4 shifted by 4 ms from the PID 8 ).
  • the downlink backhauls of four times and the uplink backhauls of six times are capable of being configured for every four Frames.
  • FIGS. 11A and 11B tabulate the backhauls configured by the backhaul configuring method exemplified in FIGS. 10A to 10H .
  • FIGS. 11A and 11B in the case where values of the Configurations are from 0 to 7, they correspond to transmission and reception timing points set in FIGS. 10A to 10H , respectively.
  • the uplink backhaul is configured.
  • the downlink backhaul is configured in the subframe #(i ⁇ 4) before 4 ms of the here described subframe #i.
  • the uplink backhauls not described in FIG. 11B are appropriately determined according to each value of the Configurations, namely, the timing of the uplink transmission of the HARQ process to be integrated.
  • the backhaul configuring method for securing the configuration frequency of the downlink and uplink backhauls as much as possible, a plurality of HARQ processes are integrated into the HARQ process in which the HARQ is incapable of being performed.
  • the configuration frequency of the backhaul is more increased and the scheduling on the access link of the relay station RN is easily performed to maintain the efficiency of the access link.
  • both of the above matters are compatible with a high level.
  • the backhaul configuring method is described assuming that the backward compatibility with the LTE is maintained with regard to reply timing of the HARQ.
  • the ACK/NACK signal is assumed to be sent back after 4 ms of the data transmission.
  • the efficiency of the access link may be improved by a method different from those described in the first to third embodiments.
  • the ACK/NACK signal is sent back after 4 ms of the downlink data transmission, and the ACK/NACK signal is sent back after 6 ms of the uplink data transmission.
  • a position of the downlink backhaul and that of the uplink backhaul are always made constant in each Frame.
  • FIG. 5 an example in which the downlink backhaul is configured in the subframe # 1 is illustrated; however, it is not limited thereto.
  • the uplink backhaul is configured after 4 ms of the downlink backhaul, the downlink backhaul may be configured in an arbitrary position of one Frame.
  • the HARQ is incapable of being performed due to the timing of a part of the respective HARQ processes of the process numbers PID 2 , PID 4 , PID 6 , and PID 8 .
  • a duration in which this HARQ is incapable of being performed is configured in the Measurement gap specified by the LTE.
  • the Measurement gap is composed of a duration of 6 ms in the downlink transmission direction and a duration of 7 ms in the uplink transmission direction provided for a handover of the mobile station UE.
  • an interval of the Measurement gap for example, 40 ms is specified.
  • the mobile station UE switches a reception frequency, and performs radio quality measurement of a frequency band different from that of the relay station RN with which the mobile station UE communicates at present. That is, since the uplink transmission is performed from the mobile station UE to the relay station RN in the Measurement gap, there is no trouble even if the HARQ is incapable of being performed in the Measurement gap.
  • FIG. 12 illustrates durations of the Measurement gap at the time when the backhaul is configured at the timing illustrated in FIG. 5 .
  • FIG. 12 differs from FIG. 5 in that duration of the Measurement gap is added.
  • (f) of FIG. 12 illustrates durations of the Measurement gaps of the mobile stations UE 1 to UE 4 .
  • Each mobile station UE connected to the relay station RN is allocated to any of the HARQ processes of the process numbers PID 1 to PID 8 .
  • the duration in which the HARQ is incapable of being performed is configured in the duration of the Measurement gap.
  • the mobile station UE 1 is allocated to the process number PID 6 .
  • the duration of the Measurement gap including the duration of the subframes # 5 to # 9 of the Frame_ 0 is configured to the mobile station UE 1 .
  • the mobile stations UE 2 , UE 3 , and UE 4 are allocated to the process numbers PID 8 , PID 2 , and PID 4 , respectively, and the duration of the Measurement gap is configured in the same manner.
  • the configuration itself of the backhaul is performed by the same method as those of the foregoing first to third embodiments.
  • the duration of the Measurement gap including the duration in which the HARQ is incapable of being performed is further configured to the mobile station UE. That is, since the Measurement gap is configured in the duration in which the access link is incapable of being used, while the configuration frequency of the backhaul is more secured, each mobile station UE maintains the efficiency of the access link.
  • the configuration of the backhaul illustrated in FIG. 12 is simply one example for describing the present embodiment.
  • the duration of the Measurement gap including the duration in which the HARQ is incapable of being performed is preferably configured to the mobile station UE allocated to the HARQ process including the HARQ incapable of being performed, irrespective of a position in one Frame of the backhaul. Accordingly, configuration of the duration of the Measurement gap according to the present embodiment is apparently applicable to the foregoing first to third embodiments. Namely, the above configuration is applicable also to a case where reply timing of the ACK/NACK signal of the LTE is maintained. In the backhaul configuring method illustrated in FIG.
  • the duration of the Measurement gap including the duration (the duration in which the HARQ is incapable of being performed) from the subframe # 4 of the Frame_ 0 to the subframe # 6 of the Frame_ 1 is configured to the mobile station UE allocated to the process number PID 5 .
  • a relay station RN and mobile station UE according to a fifth embodiment will be described below.
  • FIG. 13 is a block diagram illustrating a schematic configuration of the relay station RN.
  • the relay station RN relays radio communication between the base station eNB and the mobile station UE.
  • This relay station RN includes transmission and reception units 31 and 32 , a Uu HARQ unit 35 , a Un HARQ unit 36 , and a control unit 40 .
  • the control unit 40 includes a backhaul management unit 45 , an access link management unit 46 , and a HARQ management unit 47 .
  • the transmission and reception unit 31 (first transmission and reception unit) performs transmission and reception processing between the relay station RN and the mobile station UE.
  • the transmission and reception unit 32 (second transmission and reception unit) performs transmission and reception processing between the relay station RN and the base station eNB.
  • demodulation and decoding are performed once to received signals. Data signals of the demodulated and decoded received signals are scheduled, and then coded and modulated again for transmission.
  • the transmission and reception unit 32 FFT-processes an OFDM signal received from the base station eNB to separate a data signal of a subcarrier unit, and subjects the data signal to demodulation and decoding processing.
  • the data signal is subjected to coding and modulation processing again, and mapped to a predetermined radio frame format by a scheduler 33 .
  • the transmission and reception unit 31 performs conversion to a time area signal in each subcarrier (IFFT processing), synthesis processing of a time area signal, and CP (Cyclic Prefix) additional processing.
  • the Uu HARQ unit 35 performs HARQ relating to data transmission and reception between the relay station RN and the mobile station UE. Since the HARQ processing is previously known, detailed description will not be repeated here. At the time of the data transmission to the mobile station UE, for example, the Uu HARQ unit 35 generates data blocks obtained by subjecting information bits to error-correction-coding. In the case where the data blocks are not correctly received by the mobile station UE (in the case where the transmission and reception unit 31 receives the NACK signal), the Uu HARQ unit 35 then performs a process of generating other data blocks based on the same information bits. These data blocks are transmitted from the transmission and reception unit 31 . The Uu HARQ unit 35 then generates to the mobile station UE the ACK/NACK signal as an acknowledgment of data from the mobile station UE. This ACK/NACK signal is transmitted from the transmission and reception unit 31 .
  • the Un HARQ unit 36 performs the HARQ relating to the data transmission and reception between the relay station RN and the base station eNB.
  • the transmission and reception unit 32 of the relay station RN receives from the base station eNB a backhaul configuration message having described therein data (refer to FIGS. 9 and 11 ) of the configuration relating to the configuration of the backhaul.
  • the backhaul management unit 45 of the control unit 40 then configures and manages the backhaul between the relay station RN and the base station eNB based on the data of the configuration included in the backhaul configuration message.
  • the backhaul configuration message is transferred to the mobile station UE connected to the relay station RN.
  • the access link management unit 46 of the control unit 40 refers to the duration of the backhaul configured by the backhaul management unit 45 , and establishes the downlink backhaul to an MBSFN subframe.
  • the access link management unit further manages a UL grant (UL grant to be transmitted by PDCCH) in such a manner that the mobile station UE does not perform the uplink data transmission through the uplink backhaul configured by the backhaul management unit 45 and the UL grant is not given before 4 ms of the uplink backhaul.
  • the access link management unit 46 as a first measurement duration management unit configures in the mobile station UE allocated to the HARQ process the Measurement gap calculated by the HARQ management unit 47 , including the duration in which the HARQ is incapable of being performed in a particular HARQ process. As a message to the mobile station UE, the access link management unit 46 generates a Measurement gap configuration message having described therein information on the duration of the Measurement gap.
  • the HARQ management unit 47 as a first communication management unit manages the HARQ process in a TTI unit of the subframe.
  • the HARQ management unit 47 allocates the HARQ processes of the process numbers PID 1 to PID 8 to each connected mobile station UE.
  • the HARQ management unit 47 Based on the backhaul configuration message received from the base station eNB, the HARQ management unit 47 further calculates the HARQ process unused on the access link between the relay station RN and the mobile station UE, and the duration in which the HARQ is incapable of being performed in the HARQ process.
  • FIG. 14 is a block diagram illustrating a schematic configuration of the mobile station UE.
  • the mobile station UE performs transmission and reception of radio communication between the mobile station UE and the relay station RN.
  • This mobile station UE includes a transmission and reception unit 61 and a control unit 70 .
  • the control unit 70 includes a Uu HARQ management unit 75 (second communication management unit) and a Measurement gap management unit 76 (second measurement duration management unit).
  • the transmission and reception unit 61 performs transmission and reception processing between its own station and any of the relay station RN and the base station eNB.
  • the transmission and reception processing of the transmission and reception unit 61 is the same as that of the relay station RN.
  • the Uu HARQ management unit 75 calculates the duration in which the HARQ is incapable of being performed and manages communication timing through the access link between its own station and the relay station RN.
  • the Measurement gap management unit 76 configures (allocates) the duration of the Measurement gap based on the duration described in the Measurement gap configuring message received from the relay station RN.
  • the Measurement gap management unit 76 further switches a reception frequency in this duration, and performs measurement processing of signals in a frequency band different from that of the relay station RN with which its own station communicates at present.
  • FIGS. 15 and 16 are flowcharts illustrating one example of operations of the relay station RN.
  • the flowchart of FIG. 15 illustrates operations of the relay station RN corresponding to the second and third embodiments
  • the flowchart of FIG. 16 illustrates operations of the relay station RN corresponding to the fourth embodiment.
  • the transmission and reception unit 32 of the relay station RN receives the backhaul configuration message from the base station eNB (Step S 10 ).
  • the backhaul management unit 45 acquires the data of the Configuration (refer to FIGS. 9 and 11 ) described in the backhaul configuration message (Step S 12 ). Based on the data of the acquired Configuration, the backhaul management unit 45 configures the downlink backhaul and the uplink backhaul in each Frame according to a value of the SFN mod 4.
  • the access link management unit 46 configures the DL subframe according to the data (e.g., FIG. 9A ) of the Configuration acquired at step S 12 , namely, the MBSFN subframe (Step S 14 ).
  • the access link management unit 46 further configures the uplink backhaul according to the data (e.g., FIG. 9B ) of the Configuration acquired at step S 12 , and controls a stoppage of the UL grant (UL grant transmitted by the PDCCH) to the mobile station UE before 4 ms of the uplink backhaul (Step S 16 ).
  • the HARQ management unit 47 calculates the HARQ process which is unused on the access link between its own station and the mobile station UE (Step S 18 ).
  • steps S 30 and S 32 are added to the flowchart of FIG. 15 .
  • the access link management unit 46 configures the Measurement gap including the duration in which the HARQ is incapable of being performed in the particular HARQ process to the mobile station UE allocated to the HARQ process (Step S 30 ).
  • the transmission and reception unit 31 then transmits to the corresponding mobile station UE the Measurement gap configuration message including information on the duration of the Measurement gap configured at step S 30 (Step S 32 ).
  • FIGS. 17 and 18 are flowcharts illustrating one example of operations of the mobile station UE.
  • the flowchart of FIG. 17 illustrates operations of the mobile station UE corresponding to the second and third embodiments
  • the flowchart of FIG. 18 illustrates operations of the mobile station UE corresponding to the fourth embodiment.
  • the transmission and reception unit 61 of the mobile station UE receives the backhaul configuration message transmitted from the relay station RN (Step S 20 ).
  • the Uu HARQ management unit 75 of the control unit 70 acquires the data of the Configuration described in the backhaul configuration message acquired at step S 20 (Step S 22 ). Based on the data of the configuration acquired at step S 22 , the Uu HARQ management unit 75 further calculates the duration in which the HARQ is incapable of being performed among the HARQ processes allocated to its own station (Step S 24 ).
  • steps S 40 to S 44 are added to the flowchart of FIG. 17 .
  • the transmission and reception unit of the mobile station UE receives the Measurement gap configuration message (Step S 40 ).
  • the Measurement gap management unit 76 configures the duration of the Measurement gap described in the Measurement gap configuration message received at step S 40 (Step S 42 ). In the duration of this Measurement gap, the mobile station UE measures a signal in the frequency band different from that of the relay station RN with which its own station communicates at present.
  • the Measurement gap management unit 76 further confirms whether the downlink and uplink backhauls are included in the duration of the Measurement gap configured at step S 42 (Step S 44 ).
  • the proposed communication duration configuring method, relay station RN, mobile station UE, and mobile communication system permit a mobile communication system including the relay station RN which relays radio communication between the base station eNB and the mobile station UE to suppress a reduction in efficiency of an access link at the time of configuring a communication duration between the base station eNB and the relay station RN.

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Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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US9083494B2 (en) * 2010-03-23 2015-07-14 Qualcomm Incorporated Efficient resource utilization in TDD
US10911961B2 (en) * 2010-03-31 2021-02-02 Qualcomm Incorporated Method and apparatus to facilitate support for multi-radio coexistence
CN103108400B (zh) * 2013-01-29 2015-09-09 大唐移动通信设备有限公司 无线帧处理方法与装置
RU2690767C1 (ru) * 2015-09-22 2019-06-05 Хуавей Текнолоджиз Ко., Лтд. Способ и устройство передачи информации управления восходящего канала при агрегации несущих
RU2695635C1 (ru) * 2018-11-26 2019-07-25 Федеральное государственное бюджетное учреждение "Национальный исследовательский центр "Курчатовский институт" Способ получения радионуклеида лютеций-177

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20080090353A (ko) 2007-04-03 2008-10-08 인스티튜트 포 인포메이션 인더스트리 멀티-홉 중계 표준을 기반으로 업링크 하이브리드 자동반복 요청 패킷들을 전송하는 방법, 무선 통신 시스템,유형의 기계-판독 가능한 매체, 및 통신 장치
WO2009022826A1 (en) 2007-08-10 2009-02-19 Lg Electronics Inc. Method for controlling harq operation in dynamic radio resource allocation
US20090181689A1 (en) 2008-01-15 2009-07-16 Samsung Electronics Co. Ltd. Method for signal transmission/reception based on harq scheme in wireless mobile communication system
US20100103860A1 (en) * 2008-10-27 2010-04-29 Hak Seong Kim Method of operating relay station in wireless communication system
US20100316096A1 (en) * 2009-06-16 2010-12-16 Interdigital Patent Holdings, Inc. Method and apparatus for synchronous harq operation and interference avoidance
WO2011038801A2 (en) 2009-10-02 2011-04-07 Panasonic Corporation Relay backhaul uplink harq protocol
CA2792397A1 (en) 2010-03-12 2011-09-15 Fujitsu Limited Communication duration configuring method, relay station, mobile station and mobile communication system
US20120027110A1 (en) * 2009-04-10 2012-02-02 Seung Hee Han Method and apparatus for transmitting positioning reference signal in wireless communication system
US20120093061A1 (en) * 2008-09-08 2012-04-19 Nokia Corporation Adaptive transmission modes for transparent relay

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100901137B1 (ko) * 2006-01-03 2009-06-04 삼성전자주식회사 다중 홉 릴레이 방식 무선 접속 통신시스템에서 연결식별자관리 방법 및 장치
KR20090032184A (ko) * 2007-09-27 2009-04-01 삼성전자주식회사 이동통신 시스템의 단일 주파수 망 방송 서비스 수행 장치및 방법

Patent Citations (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080247354A1 (en) 2007-04-03 2008-10-09 Institute For Information Industry Method, wireless communication system, tangible machine-readable medium, and communication apparatus for transmitting uplink hybrid automatic repeat request packets based on a multi-hop relay standard
KR20080090353A (ko) 2007-04-03 2008-10-08 인스티튜트 포 인포메이션 인더스트리 멀티-홉 중계 표준을 기반으로 업링크 하이브리드 자동반복 요청 패킷들을 전송하는 방법, 무선 통신 시스템,유형의 기계-판독 가능한 매체, 및 통신 장치
WO2009022826A1 (en) 2007-08-10 2009-02-19 Lg Electronics Inc. Method for controlling harq operation in dynamic radio resource allocation
US20110182247A1 (en) * 2007-08-10 2011-07-28 Sung-Duck Chun Method for controlling harq operation in dynamic radio resource allocation
US20090181689A1 (en) 2008-01-15 2009-07-16 Samsung Electronics Co. Ltd. Method for signal transmission/reception based on harq scheme in wireless mobile communication system
KR20090078723A (ko) 2008-01-15 2009-07-20 삼성전자주식회사 무선 이동 통신 시스템에서 복합 자동 재송신 요구 방식에 기반한 신호 송수신 방법
US20120093061A1 (en) * 2008-09-08 2012-04-19 Nokia Corporation Adaptive transmission modes for transparent relay
US20100103860A1 (en) * 2008-10-27 2010-04-29 Hak Seong Kim Method of operating relay station in wireless communication system
US20120027110A1 (en) * 2009-04-10 2012-02-02 Seung Hee Han Method and apparatus for transmitting positioning reference signal in wireless communication system
US20100316096A1 (en) * 2009-06-16 2010-12-16 Interdigital Patent Holdings, Inc. Method and apparatus for synchronous harq operation and interference avoidance
WO2011038801A2 (en) 2009-10-02 2011-04-07 Panasonic Corporation Relay backhaul uplink harq protocol
JP2013506367A (ja) 2009-10-02 2013-02-21 パナソニック株式会社 中継バックホールアップリンクのｈａｒｑプロトコル
CA2792397A1 (en) 2010-03-12 2011-09-15 Fujitsu Limited Communication duration configuring method, relay station, mobile station and mobile communication system
US20120320823A1 (en) * 2010-03-12 2012-12-20 Fujitsu Limited Communication duration configuring method, relay station, mobile station and mobile communication system

Non-Patent Citations (21)

* Cited by examiner, † Cited by third party
Title
3GPP TR 36. 912 V9. 0. 0 (Sep. 2009), 3rd Generation Partnership Project; Technical Specification group Radio Access Network; "Feasibility study for Further Advancements for E-UTRA (LTE-Advanced) (Release 9)"; Sep. 2009.
3GPP TR 36. 913 V8. 0. 1 (Mar. 2009), 3rd Generation Partnership Project; Technical Specification Group Radio Access Network; "Requirements for further advancements for Evolved Universal Terrestrial Radio Access (E-UTRA) (LTE-Advanced) (Release 8)"; Mar. 2009.
3GPP TS 36. 133 V9. 2. 0 (Dec. 2009), 3rd Generation Partnership Project; Technical Specification Group Radio Access Network; Evolved Universal Terrestrial Radio Access (E-UTRA); "Requirements for support of radio resource management (Release 9)"; Dec. 2009.
Catt et al., "DL and UL Backhaul Subframe Allocation for Type I Relay in LTE-A", Agenda Item: 15.3, 3GPP TSG-RAN WG1 Meeting #57, R1-091989, San Francisco, USA, May 4-8, 2009.
Extended European search report with supplementary European search report and the European search opinion issued by the European Patent Office for corresponding European Patent Application No. 10847344.8, dated Sep. 7, 2017.
First Notification of Office Action issued for corresponding Chinese Application No. 201080065277.2, dated Aug. 5, 2014, with an English translation.
Fujitsu: "Discussions on HARQ for LTE-A over Un interface", Agenda Item: 7.4.2, 3GPP TSG-RAN WG2 Meeting #68, R2-097064, Jeju Island, Korea, Nov. 9-14, 2009.
Huawei: "Consideration on FDD Type 1 Relay Frame Structure", Agenda Item: 15.3, 3GPP TSG-RAN WG1 Meeting #57, R1-091807, San Francisco, USA, May 4-8, 2009.
Interdigital, "FDD Relay Type I Backhaul interference and HARQ issues" Agenda Item: 7.4, 3GPP TSG-RAN WG2 Meeting #67, R2-094221, Shenzhen, China, Aug. 24-28, 2009.
InterDigital; "FDD Relay Type I Backhaul interference and HARQ issues"; Agenda Item: 7.4; 3GPP TSG-RAN WG2 Meeting #67bis; R2-095634; Miyazaki, Japan, Oct. 12-16, 2009. Retrieved from the Internet <URL: http://www.3gpp.org/ftp/tsg_ran/WG2_RL2/TSGR2_67bis/Docs/R2-095634.zip> on May 24, 2010.
International Search Report issued for corresponding International Patent Application No. PCTJP2010/001773 dated Jun. 1, 2010.
Japanese Office Action issued by Japanese Patent Office for corresponding Japanese Patent Application No. 2012-504152, dated Oct. 29, 2013, with partial English translation.
Motorola, "Relay backhaul HARQ Discussion", Agenda Item: 7.5.1.3, Feb. 22-26, 2010, 3GPP TSG RAN WG1 Meeting #60, R1-101120, San Francisco, USA.
Nokia, Nokia Siemens Networks; "FDD HARQ Issues over Un with 8ms SF Periodicity"; Agenda Item: 7.5.1.3; 3GPP TSG-RAN WG1 Meeting #60; R1-101447; San Francisco, CA, Feb. 22-26, 2010. Retrieved from the Internet <URL: http://www.3gpp.org/ftp/tsg_ran/WG1_RL1/TSGR1_60/Docs/R1-101447.zip> on May 24, 2010.
Notice of Preliminary Rejection issued for corresponding Korean Patent Application No. 10-2014-7001267, dated Mar. 11, 2014, with an English translation.
NTT Docomo, Change Request for "Type 1 Relay definition", 3GPP TSG-RAN Meeting #60, R1-101281, San Francisco, USA, Feb. 22-26, 2010.
Office Action issued by the Canadian Intellectual Property Office for corresponding Canadian Application No. 2,792,397, dated Jan. 16, 2017.
Office Action issued by the Canadian Intellectual Property Office for corresponding Canadian Patent Application No. 2,792,397, dated Dec. 28, 2017.
Office Action issued for corresponding Canadian Application No. 2,792,397 dated Aug. 1, 2016.
Office Action issued for corresponding Canadian Application No. 2,792,397 dated Aug. 7, 2015.
Research in Motion et al: "DL HARQ operation over the Un and Uu interfaces", Agenda Item: 7, 3GPP TSG-RAN WG2 Meeting #66, R2-093123, San Francisco, USA, May 4-8, 2009.

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RU2522107C2 (ru) 2014-07-10
RU2560937C1 (ru) 2015-08-20
KR101449908B1 (ko) 2014-10-13
WO2011111110A1 (ja) 2011-09-15
RU2012142326A (ru) 2014-04-20
EP2547157A4 (en) 2017-10-11
JPWO2011111110A1 (ja) 2013-06-27
US20120320823A1 (en) 2012-12-20
KR20120125529A (ko) 2012-11-15
EP2547157A1 (en) 2013-01-16
KR101406466B1 (ko) 2014-06-13
CN102792746B (zh) 2016-01-20
JP5594358B2 (ja) 2014-09-24
KR20140025582A (ko) 2014-03-04

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